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Date Reference Description Status
30 Jan 2023 IWGMU-22-04/Rev.1
UN R117: Proposed updates to C1 tyre temperature-correction provisions
Informal Subgroup Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance
31 Jan 2023 TA-08-05
Tyre Abrasion: Validation, Correlation and Alignment Plan
Informal Group Informal Tyre abrasion test method development Tyre wear
31 Jan 2023 GRBP-77-21
UN R75: Proposal to amend document GRBP/2023/7
Working Party Informal Motorcycle and Moped Tires Motorcycle Tires Uniform Provisions Concerning the Approval of Pneumatic Tyres for Motor Cycles and Mopeds Editorial amendment to align the definition of "special tyre" with the proposal for the snow tyre definition in paragraph 2.33.
31 Jan 2023 GRBP-77-22
UN R109: Proposal to amend document GRBP/2023/10
Working Party Informal Retreaded Tires for Commercial Vehicles CV Retreaded Tires Uniform Provisions Concerning the Approval for the Production of Retreaded Pneumatic Tyres for Commercial Vehicles and their Trailers Proposal to supersede GRBP/2023/10 with a more flexible approach appropriate for covering the operations of small retreaders.
01 Feb 2023 GRBP-77-24
UN R54: Proposal to supersede document GRBP/2023/11
Working Party Informal Commercial Vehicle Tyres CV Tires Uniform Provisions Concerning the Approval of Pneumatic Tyres for Commercial Vehicles and their Trailers Proposal to replace GRBP/2023/11 with a revised proposal to address the following: 1. “Special use” tyres with nominal rim diameters larger than those listed in the present table (rim diameters up to 42, section widths up to 750 mm and overall diameters over 2 meters) and with speed symbols F and above have been announced in the European market as original equipment of N3G "special purpose vehicles" (i.e., special high speed self-propelled vehicles for agricultural and forestry use, like wood choppers). 2. Existing multi-purpose tyres (MPT) (classified as “special use tyres” as per paragraphs 2.5.3. and 3.1.13.), already type approved since years, have a tread pattern with lugs or cleats in addition to those with blocks, as evidenced by the attached slide showing some examples. It is proposed to amend paragraph 6.3.1. by clarifying that lugs and cleats are possible shapes of the mentioned blocks. 3. Testing tyres with very large overall diameters, sometimes over 2 m, on a test drum with a diameter of 1.70 m ± 1 % would be unpracticable. For practical reasons most of those tyres are regularly tested on drums with a diameter of 3 m or even larger. The proposal carries equivalence provisions from UN R106 to justify the equivalence of the test method as required by Annex 7 in point 4 “Equivalent test methods" and clarifies based on UN R117 the formula already used indirectly. 4. Some commercial vehicles are often used in the market at a reduced speed of 70 km/h with a load-capacity of the tyres increased as per load/speed combination defined in the table of Annex 8. The proposal would allow use of the speed category symbol E (but restrict it to "additional service description") to provide this information. 5. Considering that 32 km/h is already a floor value for the test-drum speed for diagonal tyres, ETRTO proposes not to apply to E speed category symbol tyres the linear decrease of the test-drum speed in function of the decrease of the speed category symbol by keeping, for safety reasons, the same test-drum speed as for F speed category symbol tyres, i.e., 32 km/h). 6. In the case of additional service descriptions mentioned in paragraph 6.2.5.1., it is proposed not to perform the additional load/speed test because the load-capacity approximates with a negligeable difference the reduction or the increase in percentage of the nominal load/speed combination applicable to the nominal speed category symbol (see Annex 8). An example of the actual differences (in percentage and in absolute value) is provided. 7. Type approval applications for radial tyres with load capacity index greater or equal to 122 and without the additional marking "LT", or "C" have been done in the past for the speed category symbol N for which the load/speed endurance test procedure is not described in Annex 7, Appendix 1. To type approve such tyres the test speed was separately defined by the different involved Type Approval Authorities. In order to harmonize the test procedure to be used for the type approval of such tyres, it is proposed to amend the Annex 7, Appendix 1 by introducing testing conditions in line with the rule applied for defining the test speed of radial tyres with load capacity index greater or equal to 122 (i.e. starting from 32 km/h set for F speed category symbol, the test speed is increased by 8 km/h respect to the one set for the previous speed category symbol). 8. The definition of "snow tyre" is amended to clarify that "snow tyres" are not only suitable for the use in snow conditions but also on mud and by replacing the term "maintain vehicle motion" (i.e. keeping the vehicle speed and direction of movement constant) by a more general concept of "controlling vehicle motion" (i.e. also being able to change the vehicle speed and direction of movement as intended). 9. It is proposed to explicitly allow other technical measurement solutions of the tyre overall width by removing the words “by caliper” which fix a technical limitation. The removal of this technical limitation would be advisable following the principle of not stopping the technical innovations.
06 Feb 2023 TA-09-02
Tyre abrasion rate measurement: Vehicle method description
Informal Group Informal Tyre abrasion test method development Tyre wear
05 Mar 2023 TA-09-03/Rev.2
Tyre abrasion: Pros and cons of UN GTR and UN Regulation
Informal Group Informal Tyre abrasion test method development Tyre wear
15 Feb 2023 WDM-1-02
Worn tyres: Input on options for water depth measurement
Informal Group Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance
20 Mar 2023 WDM-3-02
Worn tyres: Comments on water-depth measurement test plan
Informal Group Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance
06 Apr 2023 TA-11-03
Tyre abrasion: Status of correlation and validation testing
Informal Group Informal Tyre abrasion test method development Tyre wear
06 Jun 2023 TA-12-04/Rev.1
Tyre abrasion: Rationale for excluding ice tyres from the scope
Informal Group Informal Tyre abrasion test method development Tyre wear
11 May 2023 TA-13-04
Tyre abrasion: Opinion on C1 Tyre Market Assessment
Informal Group Informal Tyre abrasion test method development Tyre wear
23 May 2023 TFMU-24-03
UN R117: Noise-measurement uncertainties table
Informal Subgroup Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance
23 May 2023 TFMU-24-04
UN R117: Proposal for Supplement 2 to the 04 series of amendments
Informal Subgroup Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to introduce measures to reduce variability in noise measurement.
23 May 2023 TFMU-24-05
UN R117: Proposal for C2 noise temperature correction update
Informal Subgroup Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance
05 Jun 2023 TA-14-06
Tyres and abrasion: Ice and 3PMSF tyres
Informal Group Informal Tyre abrasion test method development Tyre wear
17 Jul 2023 TA-15-03
Tyre abrasion task force test results and data sharing proposal
Informal Group Informal Tyre abrasion test method development Tyre wear
19 Jul 2023 TA-15-07
Tyre abrasion: Preliminary proposal for C2 tyres
Informal Group Informal Tyre abrasion test method development Tyre wear
14 Jul 2023 WT-52-02
Proposal for worn tyres testing data sharing
Informal Group Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance
19 Jul 2023 TA-15-11
Tyres and abrasion: Ice and 3PMSF tyres
Informal Group Informal Tyre abrasion test method development Tyre wear
10 Aug 2023 GRBP-78-22
UN R106: Response to comments on document GRBP/2023/9
Working Party Informal Tires for Agricultural Vehicles Agricultural Tires Uniform Provisions Concerning the Approval of Pneumatic Tyres for Agricultural Vehicles and their Trailers Information concerning discussions on the proposals to extend the scope to ‘E’ speed symbol.
25 Aug 2023 GRBP-78-28
New design C3 standard reference test tyres
Working Party Informal Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance
25 Aug 2023 GRBP-78-29
Proposal to split retreaded tyre regulation
Working Party Informal Retreaded Tires for Commercial Vehicles CV Retreaded Tires Uniform Provisions Concerning the Approval for the Production of Retreaded Pneumatic Tyres for Commercial Vehicles and their Trailers Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Small group (France, Netherlands, ETRTO, BIPAVER) proposal to restructure retreaded tyre requirements and regulations.
25 Aug 2023 GRBP-78-30
UN R109: Proposal for amendments
Working Party Informal Retreaded Tires for Commercial Vehicles CV Retreaded Tires Uniform Provisions Concerning the Approval for the Production of Retreaded Pneumatic Tyres for Commercial Vehicles and their Trailers Small group proposal to split retreaded tyre requirements into a new UN Regulation.
25 Aug 2023 GRBP-78-31
Retreaded tyres: Proposal for a new UN Regulation
Working Party Informal Retreaded Tires for Commercial Vehicles CV Retreaded Tires Uniform Provisions Concerning the Approval for the Production of Retreaded Pneumatic Tyres for Commercial Vehicles and their Trailers Proposal from a small group effort for uniform provisions concerning the approval of pre-cured tread materials which are used for producing retreaded tyres or the approval of retreaded tyres produced by using mould cure process with regard to their snow performance.